/*
 * Copyright (C) 2017 Zhengzhou grandtech Technology CO.,LTD.
 * All rights reserved.
 * Official Web Site: http://www.grandtech.com.
 * Developer Web Site: http://open.grandtech.com.
 */
package com.grandtech.oss.utils;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/***
 * @author <a href="mailto:yanggh@foxmail.com">yanggh@foxmail.com</a>
 */
public class CommonUtils {
    public static String getIpAddr(HttpServletRequest request) {
        String ipAddress = null;
        // ipAddress = this.getRequest().getRemoteAddr();
        ipAddress = request.getHeader("x-forwarded-for");
        if (ipAddress == null || ipAddress.length() == 0
                || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0
                || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ipAddress == null || ipAddress.length() == 0
                || "unknown".equalsIgnoreCase(ipAddress)) {
            ipAddress = request.getRemoteAddr();
            if (ipAddress.equals("127.0.0.1")) {
                // 根据网卡取本机配置的IP
                InetAddress inet = null;
                try {
                    inet = InetAddress.getLocalHost();
                } catch (UnknownHostException e) {
                    e.printStackTrace();
                }
                ipAddress = inet.getHostAddress();
            }

        }

        // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
        if (ipAddress != null && ipAddress.length() > 15) { // "***.***.***.***".length()
            // = 15
            if (ipAddress.indexOf(",") > 0) {
                ipAddress = ipAddress.substring(0, ipAddress.indexOf(","));
            }
        }
        return ipAddress;
    }

    /**
     * 判断图片格式
     *
     * @param type
     * @return
     */
    public static boolean isFileType(String type) {
        boolean bl = false;
        String[] imageType = new String[]{"JPG", "BMP", "PCX", "TIFF", "GIF", "JPEG", "TGA", "EXIF", "FPX", "SVG", "PSD", "CDR", "PCD", "DXF", "UFO", "EPS", "AI", "PNG", "HDRI", "RAW"};
        for (int i = 0; i < imageType.length; i++) {
            if (imageType[i].equals(type)) {
                bl = true;
            }
        }
        return bl;
    }
}
